Bump build_runner from 2.4.13 to 2.4.15 in /cipd_packages/device_doctor

Bumps [build_runner](https://github.com/dart-lang/build) from 2.4.13 to 2.4.15.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_runner-v2.4.13...build_runner-v2.4.15)

---
updated-dependencies:
- dependency-name: build_runner
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

cipd_packages/device_doctor/pubspec.yaml

@@ -18,7 +18,7 @@ dependencies:
   yaml: 3.1.2
 
 dev_dependencies:
-  build_runner: 2.4.13
+  build_runner: 2.4.15
   fake_async: 1.3.3
   mockito: 5.4.4
   test: 1.25.15